Threat Intelligence and Cyber Threat Management (CTM) Protection Update for the 4th week of August 2017

New Detection Technique - CobianRAT

CobianRAT is a a new remote access Trojan (RAT) family. Cobian RAT has control panel and features are similar to that of njRAT and H-Worm, which can suggest that they share a common code base. It is noteworthy that the RAT builder contains an interesting fuction which acts as a backdoor, which retrieves the C&C information and allows the original author to control systems infected by the malware payloads generated from this backdoored kit.

We've added IDS signatures and the following correlation rule to detect this activity:

System Compromise, Malware RAT, CobianRAT

New Detection Technique - .NET Serialization RCE over DCERPC

Due to a vulnerability in .NET serialization, a compromised WMI server over DCOM using System.Management classes or the Powershell Get-WmiObject Cmdlet can lead to the server running arbitrary code on the calling machine leading to RCE.

We've added IDS signatures and the following correlation rule to detect this activity:

Exploit kits are used in "drive-by downloads." Undetectable by normal users, these kits are embedded in websites by attackers. When a user browses to a website hosting an exploit kit, the kit attempts all known attack methods to compromise the user and install malware on the user's machine. This approach is a common attack vector and a major source of infections for end users. Cybercriminals constantly change the patterns they use within their code to evade detection.

We've added new IDS signatures to include the list of certificates identified by Abuse.ch to be associated with malware or botnet activities. The updated correlation rules use this information to detect command and control (C&C) communications related to several malware families, including:

System Compromise, C&C Communication, Known malicious SSL certificate

Updated Detection Technique - Remote Access Tools

The typical attack pattern involves first an attack (exploited vulnerability) and then installation of malware. Often this last step includes a Remote Administration Toolkit (RAT) used to gain control to the compromised machine.

We added IDS signatures and correlation rules to detect the following RAT activity:

System Compromise, Malware RAT, KONNI

System Compromise, Malware RAT, NanoCore

Updated Detection Technique - ISMAgent

ISMAgent is a variant of the ISMDoor Trojan that is related to the threat actors behind the OilRig Campaign, with a possible link to the threat group GreenBug.

We've added IDS signatures and updated the following correlation rule to detect this activity:

System Compromise, Targeted Malware, ISMAgent

Updated Correlation Rules

We've updated the following correlation rules as a result of recent malicious activity: